package com.atguigu.cart.controller;

import com.atguigu.cart.interceptor.CartInterceptor;
import com.atguigu.cart.service.CartService;
import com.atguigu.cart.to.UserInfoTo;
import com.atguigu.cart.vo.CartItemVo;
import com.atguigu.cart.vo.CartVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {

    @Autowired
    private CartService cartService;

    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItemVo> getCurrentUserCartItems(){
        return cartService.getUserCartItems();
    }

    /**
     * 去购物车页面的请求
     * 浏览器有一个cookie:user-key 标识用户的身份，一个月过期
     * 如果第一次使用jd的购物车功能，都会给一个临时的用户身份:
     * 浏览器以后保存，每次访问都会带上这个cookie；
     *
     * 登录：session有
     * 没登录：按照cookie里面带来user-key来做
     * 第一次，如果没有临时用户，自动创建一个临时用户
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {

        CartVo cart = cartService.getCart();
        model.addAttribute("cart",cart);
        return "cartList";
    }

    /**
     * 添加商品到购物车
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num, RedirectAttributes ra) throws ExecutionException, InterruptedException {
        cartService.addToCart(skuId,num);
        ra.addAttribute("skuId",skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    /**
     * 跳转到成功页
     * @return
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId,Model model){
        CartItemVo item = cartService.getCartItem(skuId);
        model.addAttribute("item",item);
        return "success";
    }

    /**
     * 勾选购物项
     * @param skuId
     * @param check
     * @return
     */
    @GetMapping(value = "/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId,@RequestParam("check") Integer check){
        cartService.checkItem(skuId,check);

        return "redirect:http://cart.gulimall.com/cart.html";
    }

    /**
     * 改变商品数量
     * @param skuId
     * @param num
     * @return
     */
    @GetMapping(value = "/countItem")
    public String countItem(@RequestParam("skuId") Long skuId,@RequestParam("num") Integer num){
        cartService.changeItemCount(skuId,num);

        return "redirect:http://cart.gulimall.com/cart.html";
    }


    /**
     * 删除购物项
     * @param skuId
     * @return
     */
    @GetMapping(value = "/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId){
        cartService.deleteItem(skuId);

        return "redirect:http://cart.gulimall.com/cart.html";
    }
}
